US Senate Banking Committee Chairman Tim Scott has demanded that Nvidia CEO Jensen Huang and Commerce Secretary Howard Lutnick testify before Congress in early December over chip export controls to China. Scott's letter, sent November 13, requests Huang appear on December 3 and Lutnick on December 10, warning that a subpoena could be issued if Huang fails to comply. Lutnick has agreed to appear. Separately, chairmen of three House committees have requested that Huang and Nvidia General Counsel Tim Teter submit to closed-door questioning on December 1 and 2. The investigations center on US chip export restrictions targeting China and Nvidia's Singapore-based customer Megaspeed, which US officials identified as having a former executive linked to intelligence operations. The Justice Department says it has not reached a conclusion on the matter. Nvidia maintains it complies with all US export laws.